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pgmramp - generate a grayscale ramp
pgmramp -lr|-tb | -rectangle|-ellipse
width height
Generates a graymap of the specified size containing
a black-to-white ramp. These ramps are useful for multiplying with other
images, using the pnmarith tool.
- -lr
- A left to right ramp.
- -tb
- A top
to bottom ramp.
- -rectangle
- A rectangular ramp.
- -ellipse
- An elliptical ramp.
All flags can be abbreviated to their shortest unique prefix.
pnmarith(1)
,
pgm(5)
Copyright (C) 1989 by Jef Poskanzer.
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